<!DOCTYPE html>
<html>
<head>
    <title>注册页面</title>
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <script type="application/x-javascript"> addEventListener("load", function() { setTimeout(hideURLbar, 0); }, false); function hideURLbar(){ window.scrollTo(0,1); } </script>
    <meta name="keywords" content="User Login Form Responsive Templates, Iphone Widget Template, Smartphone login forms,Login form, Widget Template, Responsive Templates, a Ipad 404 Templates, Flat Responsive Templates" />
    <link href="css/style.css" rel='stylesheet' type='text/css' />
    <meta charset="UTF-8">
    <link href='http://fonts.googleapis.com/css?family=Montserrat:400,700' rel='stylesheet' type='text/css'>
</head>
<body>

<h1>User Register</h1>

<div class="avtar">
    <img src="img/avtar.png" />
</div>

<div class="login-form">
    <p>User already registered?<a href="login.html">Login here!</a></p>
    <div class="form-text">
        <!--value是用来在没有填任何内容的情况下，给的默认值。后面的onfocus和onblur也是围绕这一点的-->
        <input type="text" id="username" class="text"  >
        <input type="password" id="password" >
    </div>
    <input type="submit" id="submit" value="注册" >
</div>

<div class="copy-right">
    <!--这个不用管了-->
    <p><a target="_blank" href="http://www.mobanwang.com/" title="网页模板"></a></p>
</div>

<!-- 引入 jquery -->
<script src="https://apps.bdimg.com/libs/jquery/2.1.4/jquery.min.js"></script>
<!-- 实现前后端交互的逻辑 -->
<script>
    let submitButton = document.querySelector('#submit');
    submitButton.onclick = function() {
        // 1. 先获取到输入框中的内容
        let username = document.querySelector('#username').value;
        let password = document.querySelector('#password').value;
        if (username == '' || password == '') {
            alert("当前输入的用户名或者密码为空!");
            return;
        }

        // 2. 再发送 ajax 请求进行登录
        $.ajax({
            url: '/register',
            type: 'post',
            data: {
                username: username,
                password: password
            },
            success: function(body) {
                // 3. 处理响应
                // 此处的 body 相当于响应的 user 对象.
                if (body && body.userId > 0) {
                    // 登录成功!
                    alert("注册成功!");
                    // 跳转到客户端主页面 (聊天页面)
                    // 注意!! 当前尚未创建这个页面, 一会运行会出现 404
                    location.assign('/login.html');
                } else {
                    alert("登录失败!");
                }
            }
        });
    }
</script>
</body>
</html>